I have a file.js
like this:
// TICautocapture.js var TICautocapture = (function(){ var lib = {...} var error_handler; var handleError = (error_code, error_callback) => {...} function autocapture(container, options){...} return autocapture; })(); if(window.jQuery){ (function($){ $.fn.autocapture = function(options){ TICautocapture(this.attr('id'), options); } }(jQuery)); }
My question is (I’m not sure how jQuery works at this)
- What is doing the last
if
statement?
My idea is to convert that all function in a React util like
const TICautocapture = () => { // all the code inside } export default TICautocapture;
And to use its methods and values, but I don’t understand what it is doing that last part that I said. Any help please.
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Answer
What is doing the last
if
statement?
It is simply checking if jQuery exists in the window object since the $
alias is accessed in the following instruction. This is an example of IFEE. The code checks if window.jQuery
exists, then passes it to the IFEE and catches it as $
in the parameter for that function.
I hope this answered your question.